NAME

cacheflush - flush contents of instruction and/or data cache

SYNOPSIS

#include<asm/cachectl.h>intcacheflush(char*addr,intnbytes,intcache);

DESCRIPTION

cacheflush() flushes the contents of the indicated cache(s) for the
user addresses in the range addr to (addr+nbytes-1). cache may be one
of:
ICACHE Flush the instruction cache.
DCACHE Write back to memory and invalidate the affected valid cache
lines.
BCACHE Same as (ICACHE|DCACHE).

RETURNVALUE

cacheflush() returns 0 on success or -1 on error. If errors are
detected, errno will indicate the error.

ERRORS

EFAULT Some or all of the address range addr to (addr+nbytes-1) is not
accessible.
EINVALcache is not one of ICACHE, DCACHE, or BCACHE.

CONFORMINGTO

This Linux-specific system call is only available on MIPS based
systems. It should not be used in programs intended to be portable.

BUGS

The current implementation ignores the addr and nbytes arguments.
Therefore, the whole cache is always flushed.

COLOPHON

This page is part of release 2.77 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.